The 60 Ghz unlicensed spectrum was planned to be used for ultra fast WiFi networks but due to big problems with going very far and going through and around walls there are no commercial deployments.
The benefit of the millimeter wavelengths is the fact that FR circuitry can be used to detect objects, people, even faces with quite high precision. It has been used in automotive radars and now Texas Instruments is bringing the same tech to the factory. Soem even say that this tech could replace cameras for some use cases like gesture control, detection of movement, face recognition and more.
TI new 60 GHz chip includes the RF and antenna and has enough processing power to do the computing at the edge. More information about it can be found here.